_______ such heavy pollution already, it may now be too late to clean up the river. A.Having suffere

题目简介

_______ such heavy pollution already, it may now be too late to clean up the river. A.Having suffere

题目详情

_______ such heavy pollution already, it may now be too late to clean up the river.
A.Having sufferedB.SufferingC.To sufferD.Suffered
题型:单选题难度:偏易来源:不详

答案

A
句意为“这条河已经遭受如此严重的污染,现在要想清理也许为时已晚了”。suffer 发生在 clean up 之前,且有 already 暗示,无疑要用现在分词的完成式作状语。

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